1991 Cadillac Deville 1991 Cadillac Deville hesistates duri

ROOSTER CROWE

MEMBER
1991 CADILLAC DEVILLE
V8
FWD
AUTOMATIC
201,000 MILES

My 1991 Cadillac Sedan Deville is hesitating severely when I attempt to accelerate. I have checked the Air Filter, Vaccum Hoses, MAP sensor and replaced the Fuel Filter.
None of the above have helped the problem. Local parts store computer reading device will not connect to my Cadillac because it is too old but no trouble indicator lights are illuminated when the engine is running.
Stepping on the gas from idle just causes the engine to 'bogg-down' or 'bottom-out' but does not kill the engine.

Thanks in advance for your time.

3 Replies

DOCFIXIT

MECHANIC
18,828 POSTS

Check fuel pressure and TPS operation

Was this

answer

helpful?

Yes

No

Wednesday, March 25th, 2009 AT 8:36 AM

ROOSTER CROWE

MEMBER
2 POSTS

Thank you for your advice and prompt reply. I searched some of your Symptom/Solution Topics on Hesistation and Stalling. Going through your checklist, I was able to determine that the problem was a clogged catalytic converter. Loosening the exhaust manifold from the engine block and starting the car and stepping on the accelerator just a few times I could tell there was a real difference in the way the engine responded!

Thanks again so much for your efforts and time. Without your website I would have been lost.